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Transfer spi into c++

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This commit is contained in:
Thomas Klaehn
2020-03-29 20:43:56 +02:00
parent 7f1721a536
commit 53aa3ceda6
17 changed files with 131 additions and 4899 deletions
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2
src/application/blinky/main.cc
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@@ -1,5 +1,5 @@
#include "delay.h"
#include "platform/gpio.h"
#include "platform/hal.h"
using namespace hal;

36
src/application/spi/main.c
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@@ -1,36 +0,0 @@
#include "app_util_platform.h"
#include "nrf_gpio.h"
#include "nrf_delay.h"
#include "boards.h"
#include "app_error.h"
#include <string.h>
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "board.h"
#include "driver.h"
const char buf[] = "Test";
int main(void)
{
unsigned int cnt = 0;
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
drv_open(&led_1);
drv_open(&spi_0);
NRF_LOG_INFO("SPI example started.");
while(1) {
char c = (cnt++ % 2) + 0x30;
drv_write(&led_1, &c, 1);
drv_write(&spi_0, buf, sizeof(buf));
NRF_LOG_FLUSH();
nrf_delay_ms(200);
}
}

19
src/application/spi/main.cc Normal file
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@@ -0,0 +1,19 @@
#include "delay.h"
#include "platform/hal.h"
using namespace hal;
const uint8_t buf[] = "Test";
int main(void)
{
Gpio led_1(17);
Spi spi_0(0, 2, 3, 4, 25);
while(1) {
delay_ms(200);
spi_0.send(buf, sizeof(buf));
led_1.toggle();
}
}

67
src/driver.c
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@@ -1,67 +0,0 @@
#include <stdlib.h>
#include <assert.h>
#include "driver.h"
int drv_open(const struct driver *drv)
{
int res = -1;
assert(drv != NULL);
if(drv->fp->open) {
res = drv->fp->open(drv);
}
return res;
}
int drv_close(const struct driver *drv)
{
int res = -1;
assert(drv != NULL);
if(drv->fp->close) {
res = drv->fp->close(drv);
}
return res;
}
int drv_read(const struct driver *drv, char *buffer, unsigned int length)
{
int res = -1;
assert(drv != NULL);
if(drv->fp->read) {
res = drv->fp->read(drv, buffer, length);
}
return res;
}
int drv_write(const struct driver *drv, const char *buffer, unsigned int length)
{
int res = -1;
assert(drv != NULL);
if(drv->fp->write) {
res = drv->fp->write(drv, buffer, length);
}
return res;
}
int drv_ioctl(const struct driver *drv, unsigned int cmd, unsigned int argc, ...)
{
int res = -1;
assert(drv != NULL);
if(drv->fp->ioctl) {
va_list args;
va_start(args, argc);
res = drv->fp->ioctl(drv, cmd, argc, args);
va_end(args);
}
return res;
}

76
src/framebuffer.c
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@@ -1,76 +0,0 @@
#include <assert.h>
#include <stddef.h>
#include <stdlib.h>
#include "framebuffer.h"
void fb_draw_pixel(uint16_t *image, uint16_t x, uint16_t y, uint16_t color)
{
assert(image != NULL);
image[x + 240 * y] = color;
}
#ifndef _swap_int16_t
#define _swap_int16_t(a, b) { int16_t t = a; a = b; b = t; }
#endif
void fb_draw_line(uint16_t *image, int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color)
{
assert(image != NULL);
int16_t steep = abs(y1 - y0) > abs(x1 - x0);
if(steep) {
_swap_int16_t(x0, y0);
_swap_int16_t(x1, y1);
}
if(x0 > x1) {
_swap_int16_t(x0, x1);
_swap_int16_t(y0, y1);
}
int16_t dx, dy;
dx = x1 - x0;
dy = abs(y1 - y0);
int16_t err = dx / 2;
int16_t ystep;
if(y0 < y1) {
ystep = 1;
} else {
ystep = -1;
}
for(; x0 <= x1; x0++) {
if(steep) {
fb_draw_pixel(image, y0, x0, color);
} else {
fb_draw_pixel(image, x0, y0, color);
}
err -= dy;
if (err < 0) {
y0 += ystep;
err += dx;
}
}
}
void fb_load_image(uint16_t *dst, uint16_t *src, uint32_t length)
{
assert(NULL != dst);
assert(NULL != src);
for(uint32_t i = 0; i < length; i++) {
dst[i] = src[i];
}
}
void fb_set_image(uint16_t *dst, uint16_t value, uint32_t length)
{
assert(NULL != dst);
for (uint32_t i = 0; i < length; i++) {
dst[i] = value;
}
}

1
src/platform/gpio.h → src/platform/hal.h
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@@ -3,6 +3,7 @@
#if defined(PLATFORM_nrf52)
#include "platform/nrf52/gpio.h"
#include "platform/nrf52/spi.h"
namespace hal = platform::nrf52;
#endif

61
src/platform/nrf52/spi.c
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@@ -1,61 +0,0 @@
#include <assert.h>
#include <stddef.h>
#include "nrf.h"
#include "driver.h"
#include "spi.h"
static inline int spi_transfer(uint32_t t);
int spi_open(const struct driver *drv)
{
assert(NULL != drv);
struct spi *this = (struct spi *)drv->dev;
NRF_SPI0->ENABLE = 0;
NRF_SPI0->PSELSCK = this->sck_pin;
NRF_SPI0->PSELMOSI = this->mosi_pin;
NRF_SPI0->PSELMISO = this->miso_pin;
NRF_SPI0->FREQUENCY = SPI_FREQUENCY_FREQUENCY_M8;
NRF_SPI0->CONFIG = (0x03 << 1); //Sample on trailing edge of clock, shift serial data on leading edge, SCK polarity Active low
NRF_SPI0->EVENTS_READY = 0;
NRF_SPI0->ENABLE = (SPI_ENABLE_ENABLE_Enabled << SPI_ENABLE_ENABLE_Pos);
return 0;
}
int spi_close(const struct driver *drv)
{
NRF_SPI0->ENABLE = 0;
return 0;
}
int spi_write(const struct driver *drv, const char *buffer, unsigned int len)
{
assert(NULL != buffer);
//FIXME: missing CS handling
for(unsigned int i = 0; i < len; i++) {
spi_transfer(buffer[i]);
}
//FIXME: missing CS handling
return len;
}
static inline int spi_transfer(uint32_t t)
{
volatile uint32_t r;
NRF_SPI0->EVENTS_READY = 0; // ready
NRF_SPI0->TXD = t; // out
while(NRF_SPI0->EVENTS_READY == 0) {
}
r = NRF_SPI0->RXD; // in
return (int)r;
}

72
src/platform/nrf52/spi.cc Normal file
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@@ -0,0 +1,72 @@
#include <assert.h>
#include "platform/nrf52/spi.h"
extern "C" {
#include "nrf.h"
NRF_SPI_Type *SPI_REGS = reinterpret_cast<NRF_SPI_Type *>(NRF_SPI0_BASE);
// NRF_SPI_Type *const SPI_1_REGS = reinterpret_cast<NRF_SPI_Type *>(NRF_SPI1_BASE);
// NRF_SPI_Type *const SPI_2_REGS = reinterpret_cast<NRF_SPI_Type *>(NRF_SPI2_BASE);
}
using namespace platform::nrf52;
Spi::Spi(uint32_t instance, uint32_t sck, uint32_t mosi, uint32_t miso, uint32_t cs)
{
assert(instance < 3);
if(instance == 0) {
SPI_REGS = reinterpret_cast<NRF_SPI_Type *>(NRF_SPI0_BASE);
} else if(instance == 1) {
SPI_REGS = reinterpret_cast<NRF_SPI_Type *>(NRF_SPI1_BASE);
} else {
SPI_REGS = reinterpret_cast<NRF_SPI_Type *>(NRF_SPI2_BASE);
}
SPI_REGS->ENABLE = 0;
SPI_REGS->PSELSCK = sck;
SPI_REGS->PSELMOSI = mosi;
SPI_REGS->PSELMISO = miso;
SPI_REGS->FREQUENCY = SPI_FREQUENCY_FREQUENCY_M8;
SPI_REGS->CONFIG = (0x03 << 1); //Sample on trailing edge of clock, shift serial data on leading edge, SCK polarity Active low
SPI_REGS->EVENTS_READY = 0;
SPI_REGS->ENABLE = (SPI_ENABLE_ENABLE_Enabled << SPI_ENABLE_ENABLE_Pos);
}
Spi::~Spi()
{
SPI_REGS->ENABLE = 0;
}
void Spi::send(const uint8_t * buffer, uint32_t len)
{
//FIXME: missing CS handling
for(unsigned int i = 0; i < len; i++) {
this->transfer(buffer[i]);
}
//FIXME: missing CS handling
}
void Spi::recv(uint8_t * buffer, uint32_t len)
{
//FIXME: missing CS handling
for(unsigned int i = 0; i < len; i++) {
buffer[i] = this->transfer(buffer[i]);
}
//FIXME: missing CS handling
}
uint32_t Spi::transfer(uint32_t data)
{
volatile uint32_t ret;
SPI_REGS->EVENTS_READY = 0;
SPI_REGS->TXD = data;
while(SPI_REGS->EVENTS_READY == 0) {;}
ret = SPI_REGS->RXD;
return ret;
}

22
src/platform/nrf52/spi.h Normal file
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@@ -0,0 +1,22 @@
#ifndef __PLATFORM_NRF52_SPI_H__
#define __PLATFORM_NRF52_SPI_H__
#include "spi_interface.h"
namespace platform::nrf52 {
class Spi : public interfaces::SpiInterface
{
public:
Spi(uint32_t instance, uint32_t sck, uint32_t mosi, uint32_t miso, uint32_t cs);
~Spi();
void send(const uint8_t * buffer, uint32_t len) override;
void recv(uint8_t * buffer, uint32_t len) override;
private:
uint32_t transfer(uint32_t);
};
}
#endif